[프로그래머스/Java] Lv.0 마지막 두 원소

문제

 

 

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풀이

 

 

 

import java.util.Arrays;
 
class Solution {
    public int[] solution(int[] num_list) {
        int[] answer = Arrays.copyOf(num_list, num_list.length + 1);
        
        int last = num_list[num_list.length - 1];
        int second_last = num_list[num_list.length - 2];
        
        if (last > second_last) {
            answer[num_list.length] = last - second_last;
        } else {
            answer[num_list.length] = last * 2;
        }
        
        return answer;
    }
}

 

 

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